Iirc Ukraine and Belarus did sell a large number of aircraft during the 90's. Iirc the old Sri Lankan MiG-27s came second hand from Ukraine.
Wiki has a list that seems to be fairly accurate. However I would question how many of them could effectively participate in combat operations, on a 72-hours notice. My best bet would be (out of combat aircraft) 2-3 squadrons at most.They have over 850 fixed wing aircraft in their inventory, what they are I do not know but some of the aircraft buffs that frequent this site should have a close idea on what types, I should add that they also have 185 helicopters.